Defects of eyes

Name the defect of eye shown in the diagram.

Because of refractive defects of eye, the vision becomes blurred.

What are defects of eye ? Describe them briefly.

What are the two most common defects of vision (or defects of eye) ? How are they corrected ?

Name common optical defects of eye. How are thry removed ?

Given below is a diagram showing defect of human eye . Give two possible reasons for this defect of eye in human beings .